According to  development of hydrogen corrosion of evaporator tubes is conditioned by: 1) local reduction in pH values of boiler water that is local increase in the concentration of acid content in the boundary layer metal-fluid; 2) presence of deposits (particularly porous) at the inner tube surface or destabilization and partial damage of protective magnetite layers.Based on the analysis of the hydrogen damaged carried out on domestic boilers
Sep 03 2020 · A pH value of 7 indicates neutral. Below 7 indicates increasing acidity. Above 7 up to 14 indicates increasing alkalinity. pH is a very important factor for determining whether a water has a corrosive or scale-forming tendency. Water with a
Jun 24 2014 · It comes into play with steam boilers because a pH between 7 and 9 (slightly alkaline) is just right. If the pH is lower than that the water will start eating the pipes. If its higher than that the water wont corrode metal but it may begin to foam and thats not good. Hold that thought for a moment.
Dec 01 2017 · The temperature probe should be located close to the pH electrode.Press °C to display the temperature of the buffer.Press the pH key to read pH value. Stir gently wait for a couple of minutes.Adjust the STD trimmer to set the measuring indication
(ii) pH value (iii) Blow down rate and quantity. Calculation of Boiler Efficiency by Indirect Method: Boiler efficiency is estimated by the calculation of various losses in the boiler. The fuel analysis is normally made on the basis of proximate analysis and the proximate analysis can be converted to ultimate analysis.
Low pH condensate (below +/-7.5) is aggressive and will tear apart the top of a boiler in a short time. Condensate naturally occurs aggressive (low pH) because it is a combo of CO2 and H2O which forms carbonic acid. How aggressive your condensate will be depends mainly on two things: 1) The chemistry of the water you fill your boiler with.
May 05 2018 · All of the above documents contain concise instructions regarding the water chemistry of the boiler feed water and boiler water of steam boilers and hot water boilers e.g. limit values for the electrical conductivity or the pH-value.
Feb 24 2016 · It is necessary to measure the conductivity of the boiler water inside the boiler or in the blowdown line. Obviously the conditions are very different from those of the sample obtained via the sample cooler which will be cooled and subsequently neutralized (pH = 7). The main aspects are the great temperature difference and high pH.
May 04 2016 · Similarly pH 8 is 10 times more basic (alkaline) than pH 7 and pH 9 is 100 times more basic than pH 7 and so on. pH can be measured either with an electric pH meter or colorimetrically using indicators that give different colors at different pH values. Boiler pH should be kept between 10.5 and 12.5.
Excessive steam impurity concentrations can also be caused by feedwater and boiler water chemistries that favor volatile species formation. Carryover of volatile silica can be problematic at pressures above 1000 psig (6.9 MPa). Vaporous silica carryover at a pH of 10.0 is 88% of that at a pH of 8.8.
Apr 29 2020 · The pH value of the boiler water is a number between zero and fourteen. Values below seven are acidic seven is neutral and values above seven are alkaline. The pH factor is the most important factor influencing scale formation and the corrosive tendencies of boiler water.
Dec 15 2010 · PH = Logarithm of the reciprocal of the Hydrogen Ion in the solution It should be noted that as the reciprocal is being use the pH value increases as the actual hydrogen ion concentration decreases. PH Value (Reciprocal or Hydrogen Ion) Test 7.5 14.0 for Boiler Water